66814734674 has 16 divisors (see below), whose sum is σ = 101675982240. Its totient is φ = 32923470240.

The previous prime is 66814734667. The next prime is 66814734691. The reversal of 66814734674 is 47643741866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2069 + ... + 365559.

It is an arithmetic number, because the mean of its divisors is an integer number (6354748890).

Almost surely, 2^66814734674 is an apocalyptic number.

66814734674 is a deficient number, since it is larger than the sum of its proper divisors (34861247566).

66814734674 is a wasteful number, since it uses less digits than its factorization.

66814734674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364825.

The product of its digits is 16257024, while the sum is 56.

The spelling of 66814734674 in words is "sixty-six billion, eight hundred fourteen million, seven hundred thirty-four thousand, six hundred seventy-four".